The way I play: The cards you draw for Jackpot go into your original hand, so you have 12 cards to discard and draw. Then finish resolving Draw 3, Play 2 of them, then (if you didn't trash Play 3), continue playing cards from your hand.

I regard the "Hand" to be a technical term which refers to a specific set of cards. Anytime you are instructed to "set your hand aside" or "draw cards" the instructions are in reference to your actual hand of cards, and not any other spurious set of cards you are handling.

All the cards including the ones you drew for jackpot that should have gone directly into your hand. But first you need to finish out your draw 3 play 2 and discard one first. So you have 9 cards in your hand and one play left, add the jackpot, play your discard and draw....Does it say this ends your turn or do you have one play left from your hand?